{"id":35085,"date":"2019-11-22T12:59:55","date_gmt":"2019-11-22T12:59:55","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=35085"},"modified":"2019-12-04T23:25:43","modified_gmt":"2019-12-04T23:25:43","slug":"pyrocumulonimbus-clouds-in-australia","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/35085","title":{"rendered":"Pyrocumulonimbus cloud in eastern Australia"},"content":{"rendered":"<p><div style=\"width: 651px\" class=\"wp-caption aligncenter\"><a class=\"thumbnail\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/11\/191122_himawari8_visible_shortwaveInfrared_longwaveInfraredWindow_Australia_pyroCb_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/11\/HIM08_VIS_SWIR_IR_AUSTRALIA_PYROCB_22NOV2019_B3713_2019326_040000_0003PANELS_FRAME00012.GIF\" alt=\"Himawari-8 \u201cRed\u201d Visible (0.64 \u00b5m, top), Shortwave Infrared (3.9 \u00b5m, middle) and \u201cClean\u201d Infrared Window (10.4 \u00b5m, bottom) [click to play animation | MP4]\" width=\"641\" height=\"572\" \/><\/a><p class=\"wp-caption-text\">Himawari-8 \u201cRed\u201d Visible <em>(0.64 \u00b5m, top),<\/em> Shortwave Infrared <em>(3.9 \u00b5m, middle)<\/em> and \u201cClean\u201d Infrared Window<em> (10.4 \u00b5m, bottom)<\/em> [click to play animation |<a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/11\/191122_himawari8_visible_shortwaveInfrared_longwaveInfraredWindow_Australia_pyroCb_anim.mp4\"><strong> MP4<\/strong><\/a>]<\/p><\/div><a href=\"https:\/\/www.jma.go.jp\/jma\/indexe.html\"><strong>JMA<\/strong><\/a> Himawari-8 <a href=\"https:\/\/www.data.jma.go.jp\/mscweb\/en\/himawari89\/space_segment\/spsg_ahi.html\"><strong>AHI<\/strong><\/a> \u201cRed\u201d Visible (0.64 \u00b5m), Shortwave Infrared (3.9 \u00b5m) and \u201cClean\u201d Infrared Window (10.4 \u00b5m) images <em><strong>(above)<\/strong><\/em> showed the development of a pyrocumlonimbus (pyroCb) cloud produced by bush fires northwest of Sydney, Australia (station identifier YSSY) on 22 November 2019 (<a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/11\/191122_surface_analyses_Australia_anim.gif\"><strong>surface analyses<\/strong><\/a>). In the 3.9 \u00b5m images, hot thermal signatures of the bush fires <em>(darker black to red pixels)<\/em> were apparent; in addition, the cloud tops of the pyroCb cloud appeared warmer <em>(darker gray)<\/em> than surrounding convective cloud tops. The pyroCb exhibited cloud-top 10.4 \u00b5m brightness temperatures colder than -40\u00baC.<\/p>\n<p>VIIRS True Color Red-Green-Blue (RGB) and Infrared Window (11.45 \u00b5m) images from Suomi NPP and NOAA-20 as viewed using <a href=\"http:\/\/realearth.ssec.wisc.edu\"><strong>RealEarth<\/strong><\/a> are shown below. Cloud-top 11.45 \u00b5m brightness temperatures of the pyroCb were in the -70 to -75\u00baC range on the later 0407 UTC Suomi NPP image.<\/p>\n<div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/11\/191122_noaa20_suomiNPP_viirs_trueColorRGB_infraredWindow_Australia_pyrocbs_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/11\/191122_noaa20_suomiNPP_viirs_trueColorRGB_infraredWindow_Australia_pyrocbs_anim.gif\" alt=\"VIIRS True Color RGB and Infrared Window (11.45 \u00b5m) images from Suomi NPP and NOAA-20 [click to enlarge]\" width=\"640\" height=\"374\" \/><\/a><p class=\"wp-caption-text\">VIIRS True Color RGB and Infrared Window <em>(11.45 \u00b5m)<\/em> images from Suomi NPP and NOAA-20 [click to enlarge]<\/p><\/div>\n<div>The coldest Himawari-8 10.4 \u00b5m brightness temperature (BT) associated with the southernmost thunderstorm was -67.0\u00baC at 0520 UTC (with the northern pyroCb storm, closer to the fire complex, reaching -66.9\u00baC at 0500 UTC).\u00a0 According to 00 UTC <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/11\/191122_00UTC_YSWM_RAOB_DATA.TEXT\"><strong>rawinsonde data<\/strong><\/a> from nearby Williamtown <em><strong>(below),<\/strong><\/em> those BTs were 2-3\u00baC colder than the coded tropopause temp of -64.5\u00baC at 12.6 km. The VIIRS 11.45 \u00b5m BTs were nearly 10\u00baC colder than the tropopause, suggesting significant penetration of overshooting tops into the lower stratosphere.<\/div>\n<div><\/div>\n<div style=\"width: 653px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/11\/191122_00UTC_YSWM_RAOB.GIF\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/11\/191122_00UTC_YSWM_RAOB.GIF\" alt=\"Plot of rawinsonde data from Williamtown, New South Wales [click to enlarge]\" width=\"643\" height=\"482\" \/><\/a><p class=\"wp-caption-text\">Plot of rawinsonde data from Williamtown, New South Wales [click to enlarge]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>JMA Himawari-8 AHI \u201cRed\u201d Visible (0.64 \u00b5m), Shortwave Infrared (3.9 \u00b5m) and \u201cClean\u201d Infrared Window (10.4 \u00b5m) images (above) showed the development of a pyrocumlonimbus (pyroCb) cloud produced by bush fires northwest of Sydney, Australia (station identifier YSSY) on 22 November 2019 (surface analyses). In the 3.9 \u00b5m images, hot thermal signatures of the bush [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":35147,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6,62,78,53,45,49,48],"tags":[],"class_list":["post-35085","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fire-detection","category-himawari-8","category-noaa-20","category-real-earth","category-redgreenblue-rgb-images","category-suomi_npp","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/35085","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=35085"}],"version-history":[{"count":7,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/35085\/revisions"}],"predecessor-version":[{"id":35148,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/35085\/revisions\/35148"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/35147"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=35085"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=35085"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=35085"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}